code: def test_detect():
      """Test the detection of a torchelastic environment configuration."""
      with mock.patch.dict(os.environ, {}, clear=True):
          assert not TorchElasticEnvironment.detect()
  
      with mock.patch.dict(
          os.environ,
          {
              "TORCHELASTIC_RUN_ID": "",
          },
      ):
          assert TorchElasticEnvironment.detect()
  
file_path: pytorch-lightning/tests/tests_fabric/plugins/environments/test_torchelastic.py
imports: import logging
  import os
  import re
  from unittest import mock
  import pytest
  from lightning.fabric.plugins.environments import TorchElasticEnvironment
label_desc: Use image node_id 3 for calling a global function with example usage: test_detect() without return types